Method for researching variable-amplitude vibration characteristics of aerial work platform boom

Abstract

The invention discloses a method for researching variable-amplitude vibration characteristics of an aerial work platform cantilever crane, which comprises the following steps of: S01, performing spring equivalence on a variable-amplitude hydraulic oil cylinder to obtain an equivalent rear rigidity calculation model; S02, calculating to obtain a boundary condition, a continuity condition and a dynamic differential equation by utilizing a Hamiltonian principle; S03, performing homogenization on the non-homogeneous vibration differential equation obtained in the step S02 to obtain a vibration mode preliminary solution; S04, obtaining a homogeneous differential equation set of vibration, and obtaining a vibration mode characteristic value; S05, obtaining a state space equation of vibration inthe Hilbert space in combination with orthogonality between modal shapes; and S06, carrying out dynamic simulation in a Matlab / Simulink environment, and obtaining the vibration response of the head ofthe arm support along with the change of the elevation angle. The invention provides a method for researching variable-amplitude vibration characteristics of an aerial work platform cantilever crane,and can solve the problems that in the variable-amplitude motion process of an existing aerial work platform, along with the change of the variable-amplitude elevation angle, the vibration response calculation of the head of the cantilever crane is not accurate and does not meet engineering practice and the like.

Description

technical field [0001] The invention relates to a research method for the amplitude-changing vibration characteristics of a boom of an aerial work platform, and belongs to the technical field of vibration control of booms of an aerial work platform. Background technique [0002] An aerial work platform is a kind of equipment that lifts people and equipment to a certain height for operation. With the increase of working height in engineering practice, the length of the boom of the aerial work vehicle is getting larger and larger, even more than 100 meters, so the requirements for the safety and comfort of people on the boom will be further improved. In order to ensure For this requirement, the vibration of the boom must be strictly controlled and reduced. However, in the current research on the vibration of the luffing motion, when the jib model is established, the luffing system of the jib is simplified as the driving hub with the moment of inertia, and the distance between...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to overcome the defects of the prior art and provide a method that can solve the problem that the vibration response calculation of the jib head is not accurate during the luffing motion of the existing aerial work platform as the elevation angle changes. Research method of variable-amplitude vibration characteristics of aerial work platform boom that does not conform to engineering practice

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